Starletraje Posted March 29, 2008 Share Posted March 29, 2008 This may be obvious but what are breather filters for?What do they get used on? what is there purpose Etc? Quote Link to post Share on other sites
Galliano Posted March 29, 2008 Share Posted March 29, 2008 ive always wondered this... so is it basically a waste of time? (i.e. because you have it going through the air filter anyway) Quote Link to post Share on other sites
whitestarlet Posted March 29, 2008 Share Posted March 29, 2008 basically inside the engine you have moving parts i.e. pistons rods an crank. as they all move the air is getting pushed about inside the engine, air is drawn in through the filter and pushed back out again every time the engine turns one rpm. it is so there is no vacuum or pressure build up Quote Link to post Share on other sites
kevink Posted March 29, 2008 Share Posted March 29, 2008 they don't have ANY performance benifits, but are sometimes needed because a part of the air-intake is replaced with a aftermarket one that does not have a option to hook up the tube running from your rocker cover.For instance i made a custom cold air intake, i lost the possibility to hook up the tube again so i needed a Breather filter. Quote Link to post Share on other sites
paul w Posted March 29, 2008 Share Posted March 29, 2008 They make a bloody oily mess on your engine cover. The crankcase has a pipe that recirculates oil vapor into the intake pipe/dump valve. Most peeps remove the pipe/dumpvalve and or intake pipe so renering the pipe from the crankcase useless.A much better idea is to fit a catch can to collect the oil vapor instead. Quote Link to post Share on other sites
Starletraje Posted March 29, 2008 Author Share Posted March 29, 2008 Cool. i thought it was to vent the gas, but wasn't sure if it made any performance difference.Thanks guys Quote Link to post Share on other sites
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